package com.atguigu.edu.realtime.app.dwd.db;


import com.atguigu.edu.realtime.utils.MyKafkaUtil;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.table.api.Table;
import org.apache.flink.table.api.bridge.java.StreamTableEnvironment;

/**
 * 加购事实表
 */
public class DwdTradeCartAdd {
    public static void main(String[] args) {
        //TODO 1.基本环境准备
        //1.1 指定流处理环境
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
        //1.2 设置并行度
        env.setParallelism(4);
        //1.3 指定表执行环境
        StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);
        //TODO 2.检查点相关的设置(略)
        //TODO 3.从kafka的topic_db主题中读取数据 创建动态表
        tableEnv.executeSql(MyKafkaUtil.getTopicDbDDL("dwd_trade_cart_add"));
        // tableEnv.executeSql("select * from topic_db").print();
        //TODO 4.过滤出加购行为
        Table cartInfo = tableEnv.sqlQuery("select\n" +
                "`data`['id'] id,\n" +
                "`data`['user_id'] user_id,\n" +
                "`data`['course_id'] course_id,\n" +
                "`data`['course_name'] course_name,\n" +
                "`data`['session_id'] session_id,\n" +
                "ts\n" +
                "from topic_db\n" +
                "where `table`='cart_info'\n" +
                "and `type`='insert' \n");
        tableEnv.createTemporaryView("cart_info",cartInfo);
        //tableEnv.executeSql("select * from cart_info").print();

        //TODO 5.将加购数据写到kafka主题中
        //5.1 创建动态表和要写入的主题进行映射
        tableEnv.executeSql("create table dwd_trade_cart_add(\n" +
                "id String,\n" +
                "user_id String,\n" +
                "course_id String,\n" +
                "course_name String,\n" +
                "session_id String,\n" +
                "ts String,\n" +
                "primary key(id) not enforced\n" +
                ")" + MyKafkaUtil.getUpsertKafkaDDL("dwd_trade_cart_add"));
        //5.2 写入
        tableEnv.executeSql("insert into dwd_trade_cart_add select * from cart_info");
    }
}
